Rotary engine.



No. 805.162. PATENTED NOV. 21, 1905.

N. E. SMITH.

ROTARY ENGINE.

APPLIOATION FILED MARHZO, 1905.

2 SHEETS-SHEET 1.

WI TNESSES.

PATBNTED NOV. 21, 1905.

N. R. SMITH.

ROTARY ENGINE.

APPLICATION rum) MAR. 20, 1905.

2 SHEETS-SHEET 2.

UNITED STATES PATENT OFFICE.

NORMAN E. SMITH, OF SEATTLE, WASHINGTON, ASSIGNOR TO SEATTLE ROTARY ENGINE COMPANY, OF SEATTLE, WASHINGTON, A CORPORA- TION WASHINGTON.

ROTARY ENGINE.

Specification of Letters Patent.

Patented Nov. 21, 1905.

Application filed March 20, 1905- Serial No. 251,126-

io all whmn if TH/(I/Z/ concern.-

Be it known that I, NORMAN R. SMITH, a citizen of the United States of America, and a resident of the city of Seattle, in the county of King 5 and State of ashington, have invented certain new and useful Improvements in Rotary Engines, of which the following is a specification.

The present invention relates to certain new I and useful improvements in rotary engines, and has for its primary object the provision of an improved piston provided on its periphery with counterpoised swing-arms.

Further objects and advantages will be set forth in the following description, and those features of construction upon which I desire protection succinctly pointed out in the appended claims.

In the accompanying drawings, in which like numerals of reference indicate like parts throughout the several views, Figure 1 is a side view of my improved engine with one of the heads thereof removed and showing the side plate or section of the, carrier removed. Fig. 2 is a fragmentary sectional view taken on line 2 2 of Fig. 1 and showing more particularly the arrangement of one of the swingarms and its counterpoise on the carrier or piston. Fig. 3 is a detail view in perspective of one of the swing-arms. Fig. 4 is a detail view in perspective of the carrier, having the removable side section thereof removed. Fig. 5 is aview in perspective of my improved engine with parts broken away.

Referring to the drawings, numeral 1 indicates the casing of the engine formed with opposite abutments'Q and removable heads 3.

Reference-numeral 4 indicates the body portion of the rotatable piston or carrier, and to one side face thereof is removably secured a disk-shaped section 4. (See Figs. 4 and 5.) The body portion of the carrier is formed with segmental pockets 5, connected with curved ways 6, and these pockets and ways extend inward from one side of the body portion to a point in proximity to the opposite side thereof. (See Fig. 1.) Three equally spaced apart swing-arms 7 are employed by me, and to these arms weights 8 are rigidly secured, said weights being equiponderant to said swing-arms and arranged in said pockets 5. To these weights 8 curved plates 9, which form a continuation of the inner ends of the pressure parts or plates 10 of said swing-arms, are rigidly secured. The pressure-plates 10 (see Fig. 3) are of greater width than plates 9, and their opposite projecting side portions 10 are arranged in the curved slots 11, those slots at one side of the carrier being formed in the removable section 4:.

The swing-arms are arranged on the periphery of the carrier and are provided with trunnions 12, which are journaled in bearings 12, formed in the carrier,and between these swingarms rim-sections 13 are arranged, these rimsections extending over pockets 5, thereby forming closures therefor, and, being of approximately the same thickness as said swingarms, act in conjunction therewith to prevent ingress of steam into the casing, as will be more fully set forth in the following.

Each swing-arm has the under face of its head portion 1& formed with opposite steam grooves or channels 15, which are adapted to register with opposite ingress-ports 16 immediately after the swing-arm's clear the abutments 2, thereby admitting steam beneath said head portions, which will obviously tend to swing said arms outwardly. I do not rely on the steam alone, however, for opening these swing-arms, but provide in the heads 3 cam tracks or grooves 17, in which rollers 18, carried by the pressure-plates 10, roll, and these cam-grooves are so shaped as to cause positive opening of said arms as they clear the abutments 2, and, further, to positively close said arms When they pass egress-ports 20. Consequently steam being admitted beneath the arms as they are forced open by rollers 18 and cam-tracks 17 friction between said rollers and cam-tracks is greatly reduced, and therefore an easier action results.

The ingress-ports are arranged in the path of the rim-sections 13, which during their movement extend over the inner ends of said ingress-ports, and thereby prevent any discharge of the steam into the casing, and the swing-arms when closed, lying upon the periphery of the carrier, also serve to prevent ingress of the steam. When, however, the grooves 15 of the swing-arms register with the steam-ports, said swing-arms are immediately opened, as heretofore stated. Steampressure being exerted on opposite sides of rier. This feature, however, as well as the broad arrangement of the steam-channels 15 and the cam-track 17 and rollers 18 to the swing-arms, constitutes no part of the present invention, the same being covered in a copending application.

By counterpoising the swing-arms they will obviously move very freely when started, thereby reducing friction between the parts causing such movement.

Rollers, as 21, are provided in the casing for engagement with the swing-arm, the same being so positioned as to be engaged by said swing-arm and tending to close the same when rollers 18 on the pressure-plates engage the more abrupt curves in the cam-track 17, thereby causingthe said rollers 18 to move around these portions of the tracks in an easy manner.

Steam is conveyed to the ingress-ports by means of pipes, as 22. This arrangement of pipes, however, can be obviously varied at will.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent of the United States of America, is-

1. A rotary engine comprising a casing formed with ingress and egress ports, a carrier rotatable therein, and a plurality of counterpoised swing-arms extending over the periphery of the carrier and normally resting thereon.

2. A rotary engine comprising a casing formed with ingress and egress ports, a carrier rotatable therein, swing-arms normally resting on the periphery of said carrier, and counterpoised weights connected to said swing-arm.

3. in a rotary engine, a carrier formed with pockets, swing-arms normally resting on the periphery of said carrier, and counterpoised weights arranged in said pockets and being rigidly connected to said swing-arms, in combination with a casing in which said carrier is mounted for rotation.

1. A rotary engine comprising a casing, a rotatable carrier formed with pockets, swingarms arranged on the periphery of the carrier, weights connected to said swing-arms andbeing arranged in said pockets, pressure-plates connected to said swing-arms and extending into the carrier, and plates rigidly connected to said pressure-plates and to said weights.

5. A rotary engine comprising a casing, a rotatable carrier formed with pockets, swingarms arranged on the periphery of the carrier, weights connected to said swing-arms and being arranged in said pockets, pressureplates connected to said swing-arms and extending into the carrier and being rigidly connectcd to said weights, and means secured to said carrier between said swing-arms and extending over said pockets.

6. A rotary engine comprising a casing, a carrier rotatable therein, said carrier being formed in two sections, one of said sections being formed with pockets and curved ways leading therefrom, swing-arms arranged on the periphery of said carrier and having pressure-plates extending into said ways, and weights connected to said swing-arms and t0 the pressure-plates thereof and being arranged in said pockets.

7. A rotary engine comprising a casing, a rotatable carrier therein, said carrier being formed with pockets, swing-arms arranged on the periphery of said carrier, weights arranged in said pockets and being rigidly connected to said swing-arms, and rim-sections secured to the carrier between said swing-arms and projecting over said pockets.

8. A rotary engine comprising a casing formed'with a cam-track, a carrier rotatable therein, a counterpoised swing-arm on said carrier, and means operated from said camtrack for swinging said arm.

9. A rotary engine comprising a casing formed with a cam-track, a carrier rotatable therein, a counterpoised swing-arm on said carrier, a pressure-plate secured to said swingarm and projecting into the carrier, and means mounted on said pressure-plate and engaging in said cam-track, substantially as and for the purpose specified.

10. A rotary engine comprising acasing, a carrier rotatable therein, a swing-arm mounted on said carrier, a weight connected to said arm for counterpoising the same, and means connecting the free portions of said arm and weight.

11. A rotary engine comprising a casing, a carrier rotatable therein,counterpoised swingarms normally resting on the periphery of the carrier, and rim-sections secured to the carrier between said swing-arms.

12. A rotary engine comprising a casing formed with steam-inlet means and a camtrack, a carrier, a counterpoised swing-arm arranged on said carrier and being formed in its under face with means to receive steam from said inlet means, and means operated from said cam-track for swinging said arm.

Signed at Seattle, Washington, this 14th day of March, 1905.

NORMAN B. SMITH.

Witnesses:

OTIs W. BRINKER, (J. B. SUPPIGER.

IOf 

